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Adult-born granule cells mature through two functionally distinct states

  1. János Brunner
  2. Máté Neubrandt
  3. Susan Van-Weert
  4. Tibor Andrási
  5. Felix B Kleine Borgmann
  6. Sebastian Jessberger
  7. János Szabadics  Is a corresponding author
  1. Institute of Experimental Medicine, Hungarian Academy of Sciences, Hungary
  2. University of Zurich, Switzerland
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Cite this article as: eLife 2014;3:e03104 doi: 10.7554/eLife.03104

Abstract

Adult-born granule cells (ABGCs) are involved in certain forms of hippocampus-dependent learning and memory. It has been proposed that young but functionally integrated ABGCs (4-weeks-old) specifically contribute to pattern separation functions of the dentate gyrus due to their heightened excitability, whereas old ABGCs (>8-weeks-old) lose these capabilities. Measuring multiple cellular and integrative characteristics of 3-10 weeks old individual ABGCs, we show that ABGCs consist of two functionally distinguishable populations showing highly distinct input integration properties (one group being highly sensitive to narrow input intensity ranges while the other group linearly reports input strength) that are largely independent of the cellular age and maturation stage, suggesting that 'classmate' cells (born during the same period) can contribute to the network with fundamentally different functions. Thus, ABGCs provide two temporally overlapping but functionally distinct neuronal cell populations, adding a novel level of complexity to our understanding of how life-long neurogenesis contributes to adult brain function.

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Author details

  1. János Brunner

    Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
    Competing interests
    The authors declare that no competing interests exist.

  2. Máté Neubrandt

    Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
    Competing interests
    The authors declare that no competing interests exist.

  3. Susan Van-Weert

    Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
    Competing interests
    The authors declare that no competing interests exist.

  4. Tibor Andrási

    Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
    Competing interests
    The authors declare that no competing interests exist.

  5. Felix B Kleine Borgmann

    University of Zurich, Zurich, Switzerland
    Competing interests
    The authors declare that no competing interests exist.

  6. Sebastian Jessberger

    University of Zurich, Zurich, Switzerland
    Competing interests
    The authors declare that no competing interests exist.

  7. János Szabadics

    Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
    For correspondence
    szabadics.janos@koki.mta.hu
    Competing interests
    The authors declare that no competing interests exist.

Ethics

Animal experimentation: All experimental procedures were performed in accordance with the ethical guidelines of the Institute of Experimental Medicine Protection of Research Subjects Committee (permission: 22.1/1760/003/2009) and were approved by the local virus safety committee.

Reviewing Editor

  1. Gary L Westbrook, Vollum Institute, United States

Publication history

  1. Received: April 16, 2014
  2. Accepted: July 23, 2014
  3. Accepted Manuscript published: July 24, 2014 (version 1)
  4. Version of Record published: August 13, 2014 (version 2)

Copyright

© 2014, Brunner et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

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